[Asterisk-Dev] chan_bluetooth and Jabra BT250v headset

[Whoopie]

Hi,
I'm trying to get my Jabra BT250v headset to work with chan_bluetooth (Rev.
39).
I'm able to call it and it even rings (or better vibrates), but I can't
pickup the call with the headset button.
Did someone get it to work with a Jabra headset?

Thanks for your help.
Regards,
Whoopie

Verbose output:
Aug 22 18:54:20 NOTICE[2027]: chan_bluetooth.c:2078 try_connect: Initialised
bluetooth link to device BT250v
 [HS]     BT250v > AT+CIND=?
 [HS]     BT250v < +CIND:
("service",(0,1)),("call",(0,1)),("callsetup",(0-4))
 [HS]     BT250v < OK
 [HS]     BT250v > AT+CIND?
 [HS]     BT250v < +CIND: 1,0,0
 [HS]     BT250v < OK
 [HS]     BT250v > AT+CMER=3, 0, 0, 1
 [HS]     BT250v < OK
 [HS]     BT250v > AT+CHLD=?
Aug 22 18:54:23 WARNING[2027]: chan_bluetooth.c:2233 process_rfcomm_cmd:
Unknown AT Command: 'AT+CHLD=?' (+CHLD=?)
 [HS]     BT250v < ERROR

Debug output:
Aug 22 18:51:33 DEBUG[1993]: Dialing '(null)' via 'BT250v'
Aug 22 18:51:33 DEBUG[1993]: Calling BT250v on BLT/BT250v [t: 0]
Aug 22 18:51:33 DEBUG[1993]: Set channel BLT/BT250v to read format gsm
Aug 22 18:51:33 DEBUG[1993]: Set channel BLT/BT250v to write format slin
Aug 22 18:51:50 DEBUG[1993]: Hanging up channel 'BLT/BT250v'
Aug 22 18:51:50 DEBUG[1993]: blt_hangup(BLT/BT250v)

When calling the BT headset:

    -- Executing Dial("SIP/10-060e", "BLT/BT250v|60|tT") in new stack
 [HS]     BT250v < +CIEV: 3,1     (-> calling)
 [HS]     BT250v < RING
    -- Called BT250v
    -- BLT/BT250v is ringing
 [HS]     BT250v < RING
 [HS]     BT250v < RING
 [HS]     BT250v < RING
 [HS]     BT250v < +CIEV: 3,0     (-> hangup initialized by me)